I’m going to ignore Arvanitika in Central Greece, because that’s nowhere near Albania. I’m going to ignore the Albanian enclaves near Florina, because they were traditionally surrounded by Macedonian Slavonic, rather than Greek. I’m going to focus on the region around Ioannina.

The map has a patch of Aromanian to the west of Ioannina. That’s likely wrong: that region is Thesprotia, Albanian Çamëria, and it was inhabited by a substantially Albanian Muslim population until WWII.

[Edit: actually, if the map represents contemporary populations, it’s probably right; all that’s left of Çamëria is that small green dot. I think the Çam population is down to a dozen.]

Just north of the Greek–Albanian border, is the region Greeks call Northern Epirus, where there is still a Greek-speaking minority.

So you have, moving in a crooked northwest from Ioannina:

Ioannina: Greek

Thesprotia/Çamëria: Albanian

Northern Epirus (e.g. Agii Saranda/Sarandë, Himara/Himarë): Greek

Albania

And the map is patchwork, and there is presumably a continuum in Ioanninia prefecture up through Pogoniani, but yeah.

I’ll ignore Northern Epirus: they’ve a Greek enclave, so of course they’ll have a lot of Albanian. What’s more interesting is, how much Albanian got into Ioannina dialect, being at the northern edge of contiguous Greek-speaking territory. (And yes, that’s Aromanian immediately to its right: Metsovo is the Aromanian heartland.)

There are some dictionaries of Epirot dialect. The one I happened to have on my shelf was not at all promising:

The Greek nationalists unfortunately discovered the post, and the comments thread gets nasty quickly. But before it did, commenter Grigoris Kotortsinos (comment: Πενήντα ελληνικές λέξεις αλβανικής προέλευσης) mentions that the book